Step 5: Video

Step 1: Materials

2ft of 1" PVC pipe
1ft of 2" PVC pipe
One 2" cap (For bottom of cannon)
A converter to go from 2" to 1Â½"
Another converter to go from 1Â½" to 1" (They donât sell 2" to 1")
A small can of PVC cement
A small can of PVC primer (Not required, Helps it though)
A bottle of rubbing alcohol
A bag of 1" marshmallows (make sure not jumbo or they wont fit in barrel)

I'm sorry but 50 ft isn't that much. I can make a paper dart that shoots almost 70 ft with lung power. using a hole to light it isn't very safe. buy a lantern sparker so then all your doing is twisting a knob at the end of the gun. potato gun instructables might say how.

In the video I got it to about 50ft. in some of my best launches I have got it to go about 2-300 ft. Good idea with the lantern sparker though. Ill probably get one and do that.

you should take another video with a better shot and don't say it shoot's 50ft cuz that's pathetic.

If you use a better ammo it will go MUCH farther (I'm guessing about 200ft or more) I guess it depends what you are shooting at, but hey your igniting alchohol so you probably not going to shoot it a someone (at least I hope NOT).
And wouldn't the heat release toxic fumes!?!?!?!?!?

Cars release carbon-dioxide and water no worse than the human body (although maybe in larger amounts).<br/>But polyvinyl chloride (pvc) on the other hand is a synthetic hydrocarbon and like most polymers in that category it releases toxic fumes in this case its chlorobenzene ( <a rel="nofollow" href="http://en.wikipedia.org/wiki/Chlorobenzene">http://en.wikipedia.org/wiki/Chlorobenzene</a> ) which is used as a pesticide!!!! In other words its meant to kills things! If the heat is enough you could end up poisoning yourself! I mean come on guys just bui;d a pneumatic marshmellow gun.<br/>

cars release carbon monoxide.
carbon monoxide is toxic.

I have had more than 200ft with a marshmallow before it just depends on the launch. When I made the video I did a test before I filmed the one you see and I had the marshmallow go around 2-250 feet. I filmed 3 other ones but that was the best one i got in the ones I filmed. I didnât have time to wait for a perfect launch but eventually Iâll film another one that was better. I have got shot by it before (frozen marshmallow in it) and it didnât hurt one bit but anything harder than that would hurt.

Nice paint job...
No seriously, learn to use primer or get less clumsy...
Cool gun though